contrib/packaging/Makefile

--- a/contrib/packaging/Makefile	Sun Aug 25 19:38:09 2019 +0700
+++ b/contrib/packaging/Makefile	Sun Aug 25 19:46:24 2019 +0700
@@ -1,9 +1,9 @@
 $(eval HGROOT := $(shell cd ../..; pwd))
 
 DEBIAN_CODENAMES := \
-  jessie \
   stretch \
-  buster
+  buster \
+  bullseye
 
 UBUNTU_CODENAMES := \
   xenial \